MikeO89 with the exception of some of the Wolf poly coated steel case ammo like .223 and 45ACP the majority of steel case and lacquer cases will be berdan primed. Berdan primed cases actually only have two flash holes in the bottom of the case,the tiny indention between them is made by the mfg process that creates the anvil on the inside of the primer pocket.
The Berdan primer was actually invented by an American Hiram Berdan,but used by the Europeans. The boxes primer was invented by Edward Boxer an Englishman but are mainly used by US ammo makers. Berdan primers and cases are easier to mfg. but harder to reload as far as tools go and come in many different sized as compared to the four main primer sized used in US ammo.
9mm brass is plentiful check with your local shooting range for once fired brass,also be aware that 9mm military once fired brass will have crimped in primer,they usually knock out easy but require you to cut the crimp out using your deburring tool.